package com.ipet.http.utils;

import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.concurrent.TimeUnit;

import org.apache.http.NameValuePair;
import org.apache.http.ParseException;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.utils.URIBuilder;
import org.apache.http.conn.HttpClientConnectionManager;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;

public class HttpClientUtils {
	
	//设置连接超时时间
	private static final Integer CONNECTION_TIMEOUT = 2 * 1000; //设置请求超时2秒钟 根据业务调整
	private static final Integer SO_TIMEOUT = 2 * 1000; //设置等待数据超时时间2秒钟 根据业务调整

	//定义了当从ClientConnectionManager中检索ManagedClientConnection实例时使用的毫秒级的超时时间
	//这个参数期望得到一个java.lang.Long类型的值。如果这个参数没有被设置，默认等于CONNECTION_TIMEOUT，因此一定要设置。
	private static final Integer CONN_MANAGER_TIMEOUT =  2 * 1000; //在httpclient4.2.3中我记得它被改成了一个对象导致直接用long会报错，后来又改回来了
	
	private static PoolingHttpClientConnectionManager connMgr;
	
	public static PoolingHttpClientConnectionManager getConnMgr() {
		return connMgr;
	}

	private static CloseableHttpClient httpClient;
    
    static{
    	//配置一个PoolingHttpClientConnectionManager
    	// 设置连接池
        connMgr = new PoolingHttpClientConnectionManager();
        connMgr.setMaxTotal(500);
        //例如默认每路由最高50并发，具体依据业务来定
        connMgr.setDefaultMaxPerRoute(50);
        httpClient = HttpClients.custom().setConnectionManager(connMgr).build();
        
        RequestConfig.Builder configBuilder = RequestConfig.custom();
        configBuilder.setConnectionRequestTimeout(CONN_MANAGER_TIMEOUT);
        configBuilder.setConnectTimeout(CONNECTION_TIMEOUT);
        configBuilder.setSocketTimeout(SO_TIMEOUT);
        
    }
    
    
    public enum HttpClientNewBuilder {
        INSTANCE;
        public CloseableHttpClient create() {
            return httpClient;
        }
    }
    
    public static class IdleConnectionMonitorThread extends Thread {
        
        private final HttpClientConnectionManager connMgr;
        private volatile boolean shutdown;
        
        public IdleConnectionMonitorThread(HttpClientConnectionManager connMgr) {
            super();
            this.connMgr = connMgr;
        }

        @Override
        public void run() {
            try {
                while (!shutdown) {
                    synchronized (this) {
                        wait(5000);
                        // Close expired connections
                        connMgr.closeExpiredConnections();
                        // Optionally, close connections
                        // that have been idle longer than 30 sec
                        connMgr.closeIdleConnections(30, TimeUnit.SECONDS);
                    }
                }
            } catch (InterruptedException ex) {
                // terminate
            }
        }
        
        public void shutdown() {
            shutdown = true;
            synchronized (this) {
                notifyAll();
            }
        }
        
    }
    
    
    public static String doGet(String url, Map<String, String> param)  {
		String resultString = "";
		CloseableHttpResponse response = null;
		try {
			// 创建uri
			URIBuilder builder = new URIBuilder(url);
			if (param != null) {
				for (String key : param.keySet()) {
					builder.addParameter(key, param.get(key));
				}
			}
			URI uri = builder.build();
			// 创建http GET请求
			HttpGet httpGet = new HttpGet(uri);
			// 执行请求
			response = httpClient.execute(httpGet);
			// 判断返回状态是否为200
			if (response.getStatusLine().getStatusCode() == 200) {
				resultString = EntityUtils.toString(response.getEntity(), "UTF-8");
			}
		} catch (ParseException | URISyntaxException | IOException e) {
			e.printStackTrace();
		}
		return resultString;
	}
    
	public static String doGet(String url) throws ClientProtocolException, URISyntaxException, IOException {
		return doGet(url, null);
	}
	
	
	
	public static String doPost(String url, Map<String, String> param) {
		// 创建Httpclient对象
		CloseableHttpClient httpClient = HttpClients.createDefault();
		CloseableHttpResponse response = null;
		String resultString = "";
		try {
			// 创建Http Post请求
			HttpPost httpPost = new HttpPost(url);
			// 创建参数列表
			if (param != null) {
				List<NameValuePair> paramList = new ArrayList<>();
				for (String key : param.keySet()) {
					paramList.add(new BasicNameValuePair(key, param.get(key)));
				}
				// 模拟表单
				UrlEncodedFormEntity entity = new UrlEncodedFormEntity(paramList, "utf-8");
				httpPost.setEntity(entity);
			}
			// 执行http请求
			response = httpClient.execute(httpPost);
			resultString = EntityUtils.toString(response.getEntity(), "utf-8");
		} catch (Exception e) {
			e.printStackTrace();
		}    
		return resultString;
	}

	public static String doPost(String url) {
		return doPost(url, null);
	}
	
	public static void main(String[] args) {
		HttpClientUtils.IdleConnectionMonitorThread t = new HttpClientUtils.IdleConnectionMonitorThread(connMgr);
		t.start();
		for (int i = 0; i < 1000; i++) {
			new Thread(new Runnable() {
				
				@Override
				public void run() {
					
					try {
						doGet("http://www.qq.com");
					} catch (URISyntaxException | IOException e) {
						e.printStackTrace();
					}
					
				}
			}).start();
		}
	}
    

}
